98.2% of residents of Bluffton speak English at home.
0.1% of residents speak Spanish at home (100% speak English very well).
0.4% of residents speak other Indo-European language at home (100% speak English very well).
1.4% of residents speak Asian or Pacific Island language at home (19% speak English very well, 81% speak English well).

Foreign born population: 133 (3.1%)
(48.1% of them are naturalized citizens)